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client.c
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client.c
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#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include "header.h"
#include <fcntl.h>
#include <sys/stat.h>
void displayUserMenu(){
printf("User Menu\n");
printf("1) Borrow books\n");
printf("2) Return books\n");
printf("3) Exit");
printf("\n");
}
void displayAdminMenu(){
printf("Admin Menu\n");
printf("1) Add new book\n");
printf("2) Delete a book\n");
printf("3) Modify a book\n");
printf("4) Search for a book\n");
printf("5) Exit\n");
}
int authentication(int sockfd){
char username[50];
char password[50];
struct login l ;
printf("Enter username: ");
scanf("%s",&username);
//write(sockfd,&username,sizeof(username));
printf("Enter password: ");
scanf("%s",&password);
strcpy(l.username,username);
strcpy(l.password,password);
printf("%s %s\n",l.username,l.password);
write(sockfd,&l,sizeof(l));
int ans;
read(sockfd,&ans,sizeof(int));
printf("%d",ans);
return ans;
}
int main(){
printf("Waiting for server to connect\n");
int sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd == -1){
perror("Error: ");
return -1;
}
struct sockaddr_in serv;
serv.sin_family = AF_INET;
serv.sin_addr.s_addr = INADDR_ANY;
serv.sin_port = htons(5555);
if (connect(sockfd, (struct sockaddr *)&serv, sizeof(serv)) == -1){
perror("Error: ");
return -1;
}
int user;
while(1){
printf("Entering as (select option)\n");
printf("1) User\n");
printf("2) Admin\n");
printf("3) Exit\n");
scanf("%d",&user);
write(sockfd, &user, sizeof(user));
if(user == 1){
while(1){
printf("Entered as a user.\n");
printf("1) Already registered\n");
printf("2) New registration\n");
printf("3) Exit\n");
int ch ;
scanf("%d",&ch);
write(sockfd,&ch,sizeof(ch));
if(ch == 1){
int a = authentication(sockfd);
if(a == 1){
printf("Successfully Login.");
while(1){
displayUserMenu();
int c;
scanf("%d",&c);
write(sockfd,&c,sizeof(c));
if(c == 1){
printf("To borrow a book.\n");
int quantity;
printf("Books in library available: \n");
read(sockfd,&quantity,sizeof(int));
struct book books[quantity+1];
read(sockfd,&books,sizeof(books));
int h = 0;
for(int i = 0 ; i < quantity ; i++){
if(books[i].del != -1 && (books[i].qty - books[i].borrow > 0)){
printf("Id: %d , Name: %s,Author: %s,Descrp: %s\n",books[i].id,books[i].name,books[i].author,books[i].desc);
h++;
}
}
write(sockfd, &h ,sizeof(int));
if(h == 0){
printf("No books available in library.Every book is borrowed.Please come back later\n");
continue;
}
printf("Please select from above which book you want to borrow by providing id ");
int id;
scanf("%d",&id);
write(sockfd,&id,sizeof(id));
int ans;
read(sockfd,&ans,sizeof(ans));
if(ans == 1){
printf("Book successfully borrowed.\n");
}
else if(ans == 3){
printf("Maximum borrowed limit overflowed.\n");
}
else{
printf("An error occured.\n");
}
}
else if(c == 2){
printf("To return a book.\n");
int quantity;
printf("Books which you borrowed: \n");
read(sockfd,&quantity,sizeof(int));
if(quantity == 0){
printf("No books borrowed\n");
continue;
}
//struct book books[quantity+1];
int books[quantity];
read(sockfd,&books,sizeof(books));
printf("Book Ids:\n");
for(int i = 0 ; i < quantity ; i++){
printf("%d \n",books[i]);
}
printf("Please select from above which book you want to return by providing id ");
int id;
scanf("%d",&id);
write(sockfd,&id,sizeof(id));
int ans;
read(sockfd, &ans, sizeof(ans));
printf("Ans: %d\n",ans);
if(ans == 1){
printf("Book successfully returned.\n");
}
else if(ans == 2){
printf("Wrong bookId provided.\n");
}
else{
printf("An error occured.\n");
}
}
else if(c == 3){
printf("Exiting as a client.\n");
break;
}
else{
printf("Invalid choice. Please enter correct choice.\n");
}
}
}
else if(a == 2){
printf("Incorrect password.\n");
}
else{
printf("Incorrect details. Please try again later.\n");
}
}
else if(ch == 2){
struct login l;
printf("Please enter new username: ");
scanf("%s",&l.username);
printf("Please enter password: ");
scanf("%s",&l.password);
write(sockfd,&l,sizeof(l));
int ans;
read(sockfd,&ans,sizeof(ans));
if(ans == 1){
printf("New User successfully added.\n");
}
else if(ans == 2){
printf("User already exists.\n");
}
else{
printf("There was an error.\n");
}
}
else if(ch == 3){
printf("Exiting as user!\n");
break;
}
else{
printf("Please enter a correct option.\n");
}
}
}
else if(user == 2){
printf("Entered as an admin\n");
if(authentication(sockfd)){
printf("Successfully Login.\n");
while(1){
displayAdminMenu();
int c;
scanf("%d",&c);
write(sockfd,&c,sizeof(int));
if(c == 1){
printf("Please provide details for the new book:\n");
struct book b;
char name[50];
char author[50];
char desc[100];
int quantity;
printf("Book name: ");
scanf("%s",&name);
printf("Book author: ");
scanf("%s",&author);
printf("Book description: ");
scanf("%s",&desc);
printf("Book quantity: ");
scanf("%d",&quantity);
strcpy(b.author,author);
strcpy(b.desc,desc);
strcpy(b.name,name);
b.qty = quantity;
write(sockfd,&b,sizeof(struct book));
int ans;
read(sockfd,&ans,sizeof(ans));
if(ans == 1){
printf("Successfully added new book.\n");
}
else if(ans == 2){
printf("Book already exist. So please go to modify option.\n");
}
else{
printf("Unsuccessful to add a new book.\n");
}
}
else if(c == 2){
int quantity;
printf("Books in library: \n");
read(sockfd,&quantity,sizeof(int));
struct book books[quantity+1];
read(sockfd,&books,sizeof(books));
for(int i = 0 ; i < quantity ; i++){
if(books[i].del != -1){
printf("Id: %d , Name: %s\n",books[i].id,books[i].name);
}
}
printf("Please select from above which book id to delete ");
int id;
scanf("%d",&id);
write(sockfd,&id,sizeof(id));
int ans;
read(sockfd,&ans,sizeof(ans));
if(ans){
printf("Successfully deleted book with id %d.\n",id);
}
else{
printf("Unsuccessful or book does not exist.\n");
}
}
else if(c == 3){
int quantity;
printf("Books in library: \n");
read(sockfd,&quantity,sizeof(int));
struct book books[quantity+1];
read(sockfd,&books,sizeof(books));
for(int i = 0 ; i < quantity ; i++){
printf("Id: %d , Name: %s, Author: %s, Descrp: %s,Quantiy: %d,Deleted: %d\n",books[i].id,books[i].name,books[i].author,books[i].desc,books[i].qty,books[i].del);
}
printf("Please select from above which book id to modify ");
struct book b;
int id;
scanf("%d",&id);
b = books[id];
while(1){
printf("What you wish to modify: \n");
printf("1. Book Name\n");
printf("2. Book Author\n");
printf("3. Book Description\n");
printf("4. Book Quantity\n");
printf("5. Book Deleted\n");
printf("6. Exit\n");
int m ;
scanf("%d",&m);
if(m == 1){
printf("Modify book name:");
scanf("%s",&b.name);
}
else if(m ==2){
printf("Modify author name:");
scanf("%s",&b.author);
}
else if(m ==3){
printf("Modify desciption:");
scanf("%s",&b.desc);
}
else if(m ==4){
printf("Modify quantity:");
scanf("%d",&b.qty);
}
else if(m == 5){
printf("Modify deleted state(if non deleted then write 0 only):");
scanf("%s",&b.del);
}
else if(m ==6){
break;
}
else{
printf("Select correct option.\n");
}
}
printf("Modified details: \n");
printf("Id: %d , Name: %s, Author: %s, Descrp: %s,Quantiy: %d,Deleted: %d\n",b.id,b.name,b.author,b.desc,b.qty,b.del);
printf("To modify, write 1 or else any number");
int v ;
scanf("%d",&v);
if(v == 1){
write(sockfd,&b,sizeof(b));
int ans ;
read(sockfd,&ans,sizeof(ans));
if(ans){
printf("Successfully modified\n");
}
else{
printf("Modification unsuccessful\n");
}
}
else{
printf("Exit from modification\n");
}
}
else if(c == 4){
int quantity;
printf("Books in library: \n");
read(sockfd,&quantity,sizeof(int));
struct book books[quantity+1];
read(sockfd,&books,sizeof(books));
for(int i = 0 ; i < quantity ; i++){
//if(books[i].del != -1){
printf("Id: %d , Name: %s\n",books[i].id,books[i].name);
//}
}
printf("Please select from above which book id to search ");
int id;
scanf("%d",&id);
if(id < quantity && id >= 0){
struct book b = books[id];
printf("Id: %d , Name: %s, Author: %s, Descrp: %s,Quantiy: %d ,Books available in Library: %d\n",b.id,b.name,b.author,b.desc,b.qty,b.borrow);
if(b.del == -1){
printf("Book already removed from the library.");
}
}
else{
printf("Invalid Book id. Please try again later.");
}
}
else if(c == 5){
printf("Exiting as a admin.\n");
break;
}
else{
printf("Invalid choice. Please enter correct choice\n");
}
}
}
else{
printf("Incorrect details. Please try again later.");
}
}
else if(user == 3){
printf("Exiting from client side.\n");
break;
}
else{
printf("Wrong option selected.");
}
}
printf("Connection ended successfully\n");
return 0;
}